AR15.Com - Troubleshooting

Gas system woes

4/23/2024 1:46:08 PM

I recently built an upper with a Faxon 18" SOCOM profile barrel in 556 with a rifle length gas port. I used a standard non-adju...

Swapped A2 Reciever to Flat Top and now have FTF Issue

4/20/2024 12:37:30 AM

Hey All!New to the forum but not the AR. Got a wierd one. Had a fully functioning A2 - outstanding shooter. My standard issue&nb...

Swapped A2 Reciever to Flat Top and now have FTF Issue

4/20/2024 12:32:44 AM

Hey All!New to the forum but not the AR. Got a wierd one. Had a fully functioning A2 - outstanding shooter. My standard issue&nb...

New Lilja barrel

4/17/2024 1:39:16 AM

Hello folks, new to the forum. My latest build involves a 20" Lilja barrel chambered in 223 Wylde. It just came in and you can&...

IS this rust in brand new barrel

4/13/2024 11:11:46 AM

Just received a brand new barrel, it's CHF and Chrome lined. Purchased an upper from the same manufacturer and there is a feed ramp&...

safety selector stiff

4/9/2024 8:21:32 PM

My FCG trigger retaining pin hole is out of spec just enough to make my safety selector stiff and not click into position. If I...

Help swapping mil spec trigger to SSAE trigger in Spike s Lower

4/5/2024 7:18:44 PM

I bought a couple Spike's Tactical Spider complete lowers about 15 years ago or more. They've been sitting around and I'm finally g...

Trigger wouldnt release

4/3/2024 1:50:31 PM

Had weird malf. All good parts. Aero upper lower lpk by schmid gun cycled fine but trigger wouldnt release. So i opened gun, dropped...

Question about gas ring life

3/24/2024 12:21:37 AM

The bcg from one of my rifles failed the test where the rings are supposed to support the weight of the carrier. Gun only has&n...

Somebody please help

3/22/2024 4:03:01 PM

I built this at pistol and after about two shots it won�t eject the empty case all the way and tries to chamber another round&n...

Advice on 350 Legend subsonic

3/21/2024 7:10:00 PM

My setup is a unknown parts makeup upper from KM Tactical, 18" heavy barrel with mid length gas system NB BCG. Lower is a Ander...

300 Blackout Fired Cases Strange Markings

3/21/2024 5:20:38 PM

I have some marks on my brass I can't identify and I'm trying to figure out if it's a problem or not. .300 BO, Aero&nbs...

AR LR 308 malfunction issues

3/19/2024 12:31:11 PM

I have a Windham Weaponry .308 20" made mostly from the original Bushmaster. I have have more and more malfunctions since getting closer&...

Problems clearing squib load

3/18/2024 12:25:53 AM

Friend took his rifle out, came back said it wouldnt chamber .223. I said doesnt sound right, let me see the cartridge. Stamp...

Auto sear not holding hammer back

3/10/2024 5:51:00 AM

So I�m having issues with my sear, it seems like the bolt is rubbing the top of it so that by the time the bolt gets ...

BCG delayed return

3/9/2024 3:10:07 PM

Weapon: M&P15, early example. 11,5 Daniel Defense barrel, so carbine gas system. Original BCG/Bolt (AR15 style). Carbine stock, normal length carbi...

300 Blackout 110 Vmax Malfunctions

3/6/2024 6:15:35 PM

I did some digging and couldn't find much (here or elsewhere) on a specific issue I'm having with my 300 Blackout. Here's the SBR&nb...

Anybody think this barrel looks a little odd based on the borescope

3/3/2024 11:44:21 PM

I was working up some subsonic loads for a 300 blackout. It's a 10.5" Ballistic Advantage 300 blackout barrel with a Rex Mg7 308&nbs...

VLTOR A5 buffer system won t cycle without suppressor

2/27/2024 6:37:29 PM

I have a new build, A5 buffer tube/5.3oz A5 buffer/A5 spring, Faxon upper, lower, handguard and bolt, Ballistic Advantage 18� rifle length&nbs...

Carrier key question

2/20/2024 1:16:57 AM

A friend has a S&W AR that is getting small pieces of brass in the end of the carrier key, almost like it's coming down th...

LR300 bolt bounce issue with AR derivative rifle

2/19/2024 11:53:53 PM

Yes, I know that this is not an AR15 but it also sort of is. Z-M Weapons LR300 gen2.

Is this barrel safe to shoot

2/15/2024 3:02:31 AM

I picked up a lightly used barrel off a friend of a friend and I just happened to notice while making sure my feed ramps a...

Rifle gas carbin recoil

2/12/2024 2:03:15 AM

Have a 20in rifle upper on a lower with a carbine buffer tube.It will fire eject the round but won�t pickup the next round...

Worked fine then short stroked

2/11/2024 11:09:14 AM

I decided to do an experiment. I put a 308 carbine spring into my AR15 carbine length tube didn't change the standard buffer weight&...

PA 10 BCG Travel

2/10/2024 8:03:39 PM

I have a gen 1 PA-10 with a gen 3 upper and the BCG doesn't travel back far enough to lock back. I haven't fired it&...

Chrome BCG Staining

2/8/2024 1:15:25 AM

Check search of chrome only brought up barrel issues. I've a got a chrome BCG from Black River. Use it in a Mk12 clone suppress...

LR308 build not cycling need help

2/6/2024 9:38:55 PM

I built an Aero 308 with a Wilson Combat 18� barrel, matching WC gas block, rifle length gas tube, and it has a Magpul PRS ...

Out of spec bolt catch or gas block problem

2/5/2024 6:35:52 PM

Ive read the FAQs, sample post as well, and am asking some assistance, here's a part summary first, and the issue after:Upper: VL...

Intermittent failure to feed seemingly no pattern need advice

10/26/2023 3:11:04 AM

So, I'm stumped on this. I have an upper that was assembled by D. Wilson which I shot about 600 or so rounds spread between&nbs...